This Panasonic Ceiling Exhaust Fan features a Motorcycle work that uses Ball-Bearing to reduce friction on the shaft when rotating, thus making it more durable. Super comfortable. A larger propeller capable of producing a larger blow of wind. Motor work and propeller are not loud. Super Safe Thermal Fuse technology automatically stops motor work when the motor temperature reaches the maximum limit, so the fire hazard can be avoided. Product Features: -Power: 18w - Size: 8inch -Voltage: 220volts -Frequency: 50hz -Volume Water: 8.1m/min(CMM) 285.46ft/min(CFM) -Noise: 45db